参军

He was scarcely sixteen when he joined the army.

他参军时刚刚六。

Five months have elapsed since he joined the army.

"自从他参军以后,已经五个月了。"

"According to the law, a young man should enlist when he is 18."

根据法律规定青年人年满必须参军。

He wished to join the army,but was rejected as medically unfit.

他要参军,但因合格而未被批准。